I print my 400CN Kodak films on variable contrast paper all the time, and with a bit of contrast filtration, they print quite nicely. Michel is right- 400CN prints best around grade 3-3.5. The negs will also be quite dense, so your printing times will be long (I have some images which when printed to 12x18 run around 1 minute base exposure at f8 on the enlarging lens, with 30+seconds burn/dodge cycles. The advantage of course to the long exposure time is that it makes dodging patterns easier to accomplish, as you have measurable, repeatable increments into which you can split the main exposure when you only have your own two hands to do the dodging with.